Of course, things might change somewhat in the next years, we have seen both new tooling be developed and become viable, like Lens (https://k8slens.dev/) and some nice CLI tooling, like k9s (https://k9scli.io/), as well as numerous other options.

Though I guess things won't change as much for Docker Swarm (which is feature complete and doesn't have much new stuff be developed for it) or Hashicorp Nomad (because their "HashiStack" covers most of what you need already).